391 lines
10 KiB
Bash
Executable file
391 lines
10 KiB
Bash
Executable file
#!/bin/sh
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# 2020-06-13, Nico Schottelius
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# See https://ungleich.ch/u/products/viirb-ipv6-box/
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if [ $# -lt 4 ]; then
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echo "$0 interface viirb-id your-dot-cdist [stages]"
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echo " interface to add the config ip address to"
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echo " viirb-id: number in decimal format"
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echo " your-dot-cdist: path to YOUR ungleich-dot-cdist repo"
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echo " owner-mail-reference: How to identify the owner"
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echo " stages: define which stages to execute"
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echo ""
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echo " stage1: setup your host, check connection to VIIRB"
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echo " stage2: flash latest openwrt onto the VIIRB"
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echo " stage3: configure the vpn endpoint"
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echo " stage4: configure the VIIRB with wireguard + settings"
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echo " stage5: Verify VIIRB on VPN, cleanup VIIRB"
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echo ""
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echo "Example to configure viirb02:"
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echo "$0 wlan0 2 ~/vcs/ungleich-dot-cdist 'Nico Schottelius, nico.schottelius@ungleich.ch, Ticket 2342'"
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echo "$0 wlan0 2 ~/vcs/ungleich-dot-cdist 'Nico Schottelius, nico.schottelius@ungleich.ch, Ticket 2342' '1 3 4'"
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exit 1
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fi
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echo "FIXME: missing IPv6 announcements on LAN"
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echo "FIXME: DNS situation: upstream, non upstream, ungleich, how to resolve tunnel endpoint"
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set -x
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set -x
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dev=$1; shift
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id=$1; shift
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dot_cdist=$1; shift
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owner=$1; shift
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if [ $# -ge 1 ]; then
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stages=$1; shift
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else
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stages="1 2 3 4 5"
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fi
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hex_id=$(printf "%0.2x\n" "$id")
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viirb_hostname=viirb${hex_id}
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prefix_base=2a0a:e5c1:3
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my_prefix=${prefix_base}${hex_id}
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my_network=${my_prefix}::/48
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my_wireguard_ip=${my_prefix}::42
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my_lan_ip=${my_prefix}:cafe::42
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my_wifi_ip=${my_prefix}:7ea::42
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# openwrt
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version=19.07.3
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filename=openwrt-${version}-ramips-mt76x8-vocore2-squashfs-sysupgrade.bin
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# root password
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root_password=$(pwgen -1 32)
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# IP address for setting it up initially
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viirb_ip=192.168.61.1
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# wireguard
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private_key=$(wg genkey)
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public_key=$(echo $private_key | wg pubkey)
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vpn_endpoint_host=vpn-2a0ae5c1300.ungleich.ch
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vpn_endpoint_pubkey=ft68G2RID7gZ6PXjFCSCOdJ9yspRg+tUw0YrNK9cTxE=
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# cdist
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dot_cdist_files=${dot_cdist}/type/__ungleich_wireguard/files
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peerfilename=${vpn_endpoint_host}.peer${hex_id}
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peerfile=${dot_cdist_files}/${peerfilename}
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vpnconfig=${dot_cdist_files}/${vpn_endpoint_host}
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################################################################################
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# Stage 1: test / connect to the new VIIRB
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#
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# We delete so that we can run idempotent
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stage1()
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{
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sudo ip addr del 192.168.61.2/24 dev "$dev" 2>/dev/null || true
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sudo ip addr add 192.168.61.2/24 dev "$dev"
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# don't care about other/old known_host entries
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ssh-keygen -R ${viirb_ip}
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ping -c2 ${viirb_ip}
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if [ $? -ne 0 ]; then
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echo "Cannot reach any VIIRB - exiting"
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exit 1
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fi
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cat ~/.ssh/id_rsa.pub | ssh root@${viirb_ip} "cat > /etc/dropbear/authorized_keys"
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}
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################################################################################
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# Get latest OpenWRT & flash it
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stage2()
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{
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# Don't re-download if we already have it
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wget -c http://downloads.openwrt.org/releases/${version}/targets/ramips/mt76x8/${filename}
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scp ${filename} root@${viirb_ip}:/tmp
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ssh root@${viirb_ip} "sysupgrade /tmp/*.bin"
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# It still pings for some time - wait for the reboot to happen
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echo "Waiting for VIIRB to disappear"
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sleep 15
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wait=0
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found=""
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while [ $wait -lt 180 ]; do
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ping -c1 ${viirb_ip} >/dev/null
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if [ $? -eq 0 ]; then
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found=yes
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# wait for ssh to come up
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sleep 10
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break
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fi
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sleep 1
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wait=$((wait+1))
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done
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if [ ! "$found" ]; then
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echo "Did not find updated viirb - debug / restart it"
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exit 1
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fi
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}
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################################################################################
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# Stage 3: prepare VPN endpoint
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#
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stage3()
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{
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# Configure VPN server / update cdist
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echo Updating VPNserver
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cat <<EOF > ${peerfile}
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# ${viirb_hostname} ${owner}
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[Peer]
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PublicKey = ${public_key}
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AllowedIPs = ${my_network}
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EOF
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# Generate real config
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cat ${dot_cdist_files}/${vpn_endpoint_host}.* > ${vpnconfig}
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cd ${dot_cdist_files}
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git add ${vpn_endpoint_host} ${peerfilename}
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git commit -m "[vpn] Updated config for peer ${viirb_hostname} ${my_network}"
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git pull
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git push
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cdist config -vv -j8 ${vpn_endpoint_host} -c ${dot_cdist}
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}
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################################################################################
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# Stage 4: configure the VIIRB
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#
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stage4()
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{
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cat <<EOF | ssh -t "root@${viirb_ip}"
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set -x
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# Setup lan to also retrieve an ip address via dhcp
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# This stays in the final setup
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uci set network.lan.proto='dhcp'
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uci delete network.lan.ipaddr
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uci delete network.lan.netmask
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# This is temporary
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uci set network.lanv4temp=interface
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uci set network.lanv4temp.proto='static'
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uci set network.lanv4temp.ifname='br-lan'
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uci set network.lanv4temp.ipaddr='192.168.61.1'
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uci set network.lanv4temp.netmask='255.255.255.0'
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uci commit network
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/etc/init.d/network restart
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# ensure internet is up and running
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sleep 3
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ping -c5 ungleich.ch
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# update the sources
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opkg update
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# install wireguard + gui
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opkg install wireguard
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opkg install luci-app-wireguard
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# The IPv6 lan configuration
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uci set network.lanv6=interface
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uci set network.lanv6.proto='static'
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uci set network.lanv6.ip6addr='${my_lan_ip}/64'
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uci set network.lanv6.ifname='br-lan'
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# wifi ip address
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uci set network.wifi=interface
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uci set network.wifi.proto='static'
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uci set network.wifi.ip6addr='${my_wifi_ip}/64'
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# Wifi configuration
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uci set wireless.radio0=wifi-device
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uci set wireless.radio0.type='mac80211'
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uci set wireless.radio0.hwmode='11g'
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uci set wireless.radio0.path='platform/10300000.wmac'
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uci set wireless.radio0.htmode='HT40'
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uci set wireless.radio0.country='CH'
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uci set wireless.radio0.channel='6'
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# Ensure it is not disabled
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uci delete wireless.radio0.disabled
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uci set wireless.default_radio0=wifi-iface
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uci set wireless.default_radio0.device='radio0'
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uci set wireless.default_radio0.mode='ap'
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uci set wireless.default_radio0.encryption='psk2'
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uci set wireless.default_radio0.key='iloveipv6'
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uci set wireless.default_radio0.ssid='IPv6 everywhere ${viirb_hostname}'
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uci set wireless.default_radio0.network='wifi'
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# Wifi / Router advertisements
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uci set dhcp.wifi=dhcp
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uci set dhcp.wifi.interface='wifi'
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uci set dhcp.wifi.ra='server'
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uci set dhcp.wifi.dynamicdhcp='0'
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# LAN / Router advertisements / DHCP
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# DHCP: we are not authoratative
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uci delete dhcp.@dnsmasq[0].authoritative
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uci delete dhcp.lan.dhcpv6
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uci delete dhcp.lan.start
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uci delete dhcp.lan.limit
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uci delete dhcp.lan.leasetime
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# Do not announce ULA - we have GUA
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uci delete network.globals.ula_prefix
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uci set dhcp.lan=dhcp
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uci set dhcp.lan.interface='lanv6'
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uci set dhcp.lan.ra='server'
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uci set dhcp.lan.dynamicdhcp='0'
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# Fix DNS: make dnsmasq NOT use a resolv.conf
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# so that it only reads from our servers with DNS64 enabled
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uci set dhcp.@dnsmasq[0].noresolv='1'
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# Fix DNS: make the OS use the locally provided DNS servers
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# otherwise the VPN tunnel cannot be established
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dhcp.@dnsmasq[0].localuse='0'
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# DNS upstream over VPN gives DNS64
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uci delete dhcp.@dnsmasq[0].server
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uci add_list dhcp.@dnsmasq[0].server='2a0a:e5c0:0:a::a'
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uci add_list dhcp.@dnsmasq[0].server='2a0a:e5c0:2:a::a'
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# VPN / Wireguard
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uci set network.wg0=interface
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uci set network.wg0.proto='wireguard'
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uci set network.wg0.private_key='${private_key}'
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uci set network.wg0.listen_port='51820'
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uci set network.wg0.addresses='${my_wireguard_ip}/64'
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if ! uci get network.@wireguard_wg0[0]; then
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uci add network wireguard_wg0
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fi
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uci set network.@wireguard_wg0[0]=wireguard_wg0
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uci set network.@wireguard_wg0[0].persistent_keepalive='25'
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uci set network.@wireguard_wg0[0].public_key='${vpn_endpoint_pubkey}'
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uci set network.@wireguard_wg0[0].description='IPv6VPN.ch by ungleich'
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uci set network.@wireguard_wg0[0].allowed_ips='::/0'
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uci set network.@wireguard_wg0[0].endpoint_host='${vpn_endpoint_host}'
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uci set network.@wireguard_wg0[0].endpoint_port='51820'
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uci set network.@wireguard_wg0[0].route_allowed_ips='1'
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uci set system.@system[0].hostname="${viirb_hostname}"
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uci commit
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# Firewall configuration
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if ! uci show firewall | grep "name='Allow-SSH'"; then
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uci add firewall rule
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uci set firewall.@rule[-1].name='Allow-SSH'
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uci set firewall.@rule[-1].src='wan'
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uci set firewall.@rule[-1].dest='lan'
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uci set firewall.@rule[-1].proto='tcp'
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uci set firewall.@rule[-1].dest_port='22'
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uci set firewall.@rule[-1].target='ACCEPT'
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fi
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if ! uci show firewall | grep "name='Allow-HTTPS'"; then
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uci add firewall rule
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uci set firewall.@rule[-1].name='Allow-HTTPS'
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uci set firewall.@rule[-1].src='wan'
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uci set firewall.@rule[-1].dest='lan'
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uci set firewall.@rule[-1].proto='tcp'
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uci set firewall.@rule[-1].dest_port='443'
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uci set firewall.@rule[-1].target='ACCEPT'
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fi
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if ! uci show firewall | grep "name='Allow-HTTP'"; then
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uci add firewall rule
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uci set firewall.@rule[-1].name='Allow-HTTP'
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uci set firewall.@rule[-1].src='wan'
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uci set firewall.@rule[-1].dest='lan'
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uci set firewall.@rule[-1].proto='tcp'
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uci set firewall.@rule[-1].dest_port='80'
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uci set firewall.@rule[-1].target='ACCEPT'
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fi
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# Add interfaces to the right network zone
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uci set firewall.@zone[0].network='lan lanv6 wifi'
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uci set firewall.@zone[1].network='wg0'
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uci commit firewall
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# Reboot
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reboot
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EOF
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echo "Wireguard public key: ${public_key}"
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}
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################################################################################
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# Stage 5: Verify the VIIRB via VPN
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#
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stage5()
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{
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# Wait for the VIIRB to come back, but on the VPN address
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wait=0
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found=""
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while [ $wait -lt 180 ]; do
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ping -c1 ${my_wireguard_ip} >/dev/null
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if [ $? -eq 0 ]; then
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found=yes
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break
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fi
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sleep 1
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wait=$((wait+1))
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done
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if [ ! "$found" ]; then
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echo "Cannot reach VIIRB via VPN - check manually"
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exit 1
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fi
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echo "Cleanup process."
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echo "Set the root password when prompted to: ${root_password}"
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# VPN works, remove artefacts, set correct DNS servers that support DNS64
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cat <<EOF | ssh -t "root@${viirb_ip}"
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# Remove temporary IP
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uci delete network.lanv4temp
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# Correct SSID
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uci set wireless.default_radio0.ssid='IPv6 everywhere'
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uci commit
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# Remove our ssh keys
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rm -f /etc/dropbear/authorized_keys
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# Setup root password
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printf "${root_password}\n${root_password}\n" | passwd
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EOF
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echo "Submit to user the root password = ${root_password}"
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}
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for stage in $(seq 1 5);do
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if echo $stages | grep -q $stage; then
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eval stage${stage}
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fi
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done
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